摘要
当用能量大于其禁带宽度的光照射通有氧气的TiO2悬浮液时,在TiO2微粒表面会产生反应活性很高的空穴和O2-、H2O2等多种活性氧.在上一篇文章中[1]我们已报道了在通氧气和紫外光照的条件下,向TiO2悬浮液中加入少量Ag+或Pd2+,将会大幅度提高...
Photodegradation of CH 3CHO catalyzed by TiO 2 was accelerated after Ag + or Pd 2+ was added into TiO 2 aqueous suspension. Under nitrogen, Ag + and Pd 2+ only acted as electron acceptors to separate electron and hole well, while under oxygen, Ag + and Pd 2+ not only acted as electron acceptors but also increased H 2O 2 produced by illumination in the suspension. But photocatalytic activity of TiO 2 was only improved under oxygen after surface modification was used. Our results show that the concentration of H 2O 2 in the suspension has great effect on photodegradation of CH 3CHO assisted by TiO 2.
出处
《感光科学与光化学》
CSCD
1999年第1期12-16,共5页
Photographic Science and Photochemistry